From 5ac74e2186d3488beae809624068af70f8efd68f Mon Sep 17 00:00:00 2001
From: Thaddeus <thad@tardis.dev>
Date: Mon, 5 Aug 2024 14:15:34 +0200
Subject: [PATCH] improvement: handle invalid ascendex depth messages
 gracefully

---
 src/mappers/ascendex.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/mappers/ascendex.ts b/src/mappers/ascendex.ts
index dc359e3..7d110f8 100644
--- a/src/mappers/ascendex.ts
+++ b/src/mappers/ascendex.ts
@@ -54,6 +54,10 @@ export class AscendexBookChangeMapper implements Mapper<'ascendex', BookChange>
   }
 
   *map(message: AscendexDepthRealTime | AscendexDepthRealTimeSnapshot, localTimestamp: Date): IterableIterator<BookChange> {
+    if (!message.symbol || !message.data.bids || !message.data.asks) {
+      return
+    }
+
     yield {
       type: 'book_change',
       symbol: message.symbol,